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Measuring rice paddy persistence spanning a century with Japan's oldest topographic maps: georeferencing the Rapid Survey Maps for GIS analysis / D.S. Sprague in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)
[article]
Titre : Measuring rice paddy persistence spanning a century with Japan's oldest topographic maps: georeferencing the Rapid Survey Maps for GIS analysis Type de document : Article/Communication Auteurs : D.S. Sprague, Auteur ; N. Iwasaki, Auteur ; S Takahashi, Auteur Année de publication : 2007 Article en page(s) : pp 83 - 95 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] carroyage
[Termes IGN] carte topographique
[Termes IGN] géoréférencement
[Termes IGN] Japon
[Termes IGN] numérisation de carte
[Termes IGN] point d'appui
[Termes IGN] projection
[Termes IGN] rizière
[Termes IGN] système d'information géographiqueRésumé : (Auteur) The Rapid Survey Maps, or Jinsoku Sokuzu, are the first series of topographic maps covering a large region drawn by modern surveying methods in Japan. These maps have no projection or map grid. To incorporate them into a historical GIS, analysts need to identify valid ground control points to georeference these maps, and identify features that are more likely to be distorted than other features. We studied the internal distortion in Rapid Survey Maps while carrying out an overlay analysis for rice paddies between them and a modern land use map. An irregular overall pattern of distortion implied that most were due to local surveying errors. In particular, long, thin rice paddy branches were distorted, leading to mismatches between rice paddies in the older maps with those in the newer map. This mismatch tended to exaggerate the area of rice paddies lost to non-paddy land uses in the overlay analysis with a modern land use map. Copyright Taylor & Francis Numéro de notice : A2007-027 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600816433 En ligne : https://doi.org/10.1080/13658810600816433 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28393
in International journal of geographical information science IJGIS > vol 21 n° 1-2 (january 2007) . - pp 83 - 95[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07011 RAB Revue Centre de documentation En réserve L003 Disponible 079-07012 RAB Revue Centre de documentation En réserve L003 Disponible Seroprevalence of malaria in inhabitants of the urban zone of Antananarivo, Madagascar / Olivier Domarle in Malaria Journal, n° 5 ([01/11/2006])
[article]
Titre : Seroprevalence of malaria in inhabitants of the urban zone of Antananarivo, Madagascar Type de document : Article/Communication Auteurs : Olivier Domarle, Auteur ; Romy Razakandrainibe, Auteur ; Emma Rakotomalala, Auteur ; Laurence Jolivet , Auteur ; Rindra Vatosoa Randremanana, Auteur ; F. Rakotomanana, Auteur ; Charles Emile Ramarokoto, Auteur ; Jean-Louis Soares, Auteur ; Frédéric Ariey, Auteur Année de publication : 2006 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] maladie parasitaire
[Termes IGN] population urbaine
[Termes IGN] risque sanitaire
[Termes IGN] rizière
[Termes IGN] Tananarive (Madagascar)Résumé : (auteur) Background : Antananarivo, the capital of Madagascar, is located at an altitude of over 1,200 m. The environment at this altitude is not particularly favourable to malaria transmission, but malaria nonetheless remains a major public health problem. The aim of this study was to evaluate exposure to malaria in the urban population of Antananarivo, by measuring the specific seroprevalence of Plasmodium falciparum.
Methods : Serological studies specific for P. falciparum were carried out with an indirect fluorescent antibody test (IFAT). In a representative population of Antananarivo, 1,059 healthy volunteers were interviewed and serum samples were taken.
Results : The seroprevalence of IgG+IgA+IgM was 56.1% and that of IgM was 5.9%. The major risk factor associated with a positive IgG+IgA+IgM IFAT was travel outside Antananarivo, whether in the central highlands or on the coast. The abundance of rice fields in certain urban districts was not associated with a higher seroprevalence.
Conclusion : Malaria transmission levels are low in Antananarivo, but seroprevalence is high. Humans come into contact with the parasite primarily when travelling outside the city. Further studies are required to identify indigenous risk factors and intra-city variations more clearly.Numéro de notice : A2006-303 Affiliation des auteurs : COGIT+Ext (1988-2011) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1186/1475-2875-5-106 Date de publication en ligne : 10/11/2006 En ligne : https://doi.org/10.1186/1475-2875-5-106 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93947
in Malaria Journal > n° 5 [01/11/2006][article]Analysis of land use drivers at the watershed and household level: Linking two paradigms at the Philippine forest fringe / K.P. Overmars in International journal of geographical information science IJGIS, vol 19 n° 2 (february 2005)
[article]
Titre : Analysis of land use drivers at the watershed and household level: Linking two paradigms at the Philippine forest fringe Type de document : Article/Communication Auteurs : K.P. Overmars, Auteur ; P.H. Verburg, Auteur Année de publication : 2005 Article en page(s) : pp 125 - 152 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse spatiale
[Termes IGN] bassin hydrographique
[Termes IGN] carte d'occupation du sol
[Termes IGN] changement d'occupation du sol
[Termes IGN] données localisées
[Termes IGN] données socio-économiques
[Termes IGN] géographie physique
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Terra-ASTER
[Termes IGN] maïs (céréale)
[Termes IGN] Manille (Philippines)
[Termes IGN] Musa (genre)
[Termes IGN] occupation du sol
[Termes IGN] régression
[Termes IGN] rizière
[Termes IGN] utilisation du sol
[Termes IGN] variableRésumé : (Auteur) Land use and land cover change (LUCC) is the result of the complex interactions between behavioural and structural factors (drivers) associated with the demand, technological capacity, social relations and the nature of the environment in question. Although no general theory of land use change exists, different disciplinary theories can help us to analyse aspects of LUCC in specific situations. However, paradigms and theories applied by the different disciplines are often difficult to integrate and their specific research results do not easily combine into an integrated understanding of LUCC. Geographical approaches often aim to identify the location of LUCC in a spatially explicit way, while socio-economic studies aim to understand the processes of LUCC, but often lack spatial context and interactions. The objective of this study is to integrate process information from a socioeconomic study into a geographical approach. First, a logistic regression analysis is performed on household survey data from interviews. In this approach the occurrence of the land use types corn, wet rice and banana is explained by a set of variables that are hypothesised to be explanatory for those land use types, with fields as the unit of analysis. The independent variables consist of household characteristics, like ethnicity and age, and plot and field information, like tenure, slope and travel time. The results of these analyses are used to identify key variables explaining land use choice, which subsequently are also collected at watershed level, using maps, census data and remote sensing imagery. Logistic regression analysis of this spatial dataset, where a ten percent sample of a 50 by 50 m grid was analysed, shows that the key variables identified in the household analysis are also important at the watershed level. Important drivers in the study area are, among others, slope, ethnicity, accessibility and place of birth. The differences in the contribution of the variables to the models at household and watershed level can be attributed to differences in spatial extent and data representation. Comparing the model with a mainstream geographical approach indicates that the spatial model informed by the household analysis gives a better insight in the actual processes determining land use than the mainstream geographic approach. Numéro de notice : A2005-045 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001713380 En ligne : https://doi.org/10.1080/13658810410001713380 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27183
in International journal of geographical information science IJGIS > vol 19 n° 2 (february 2005) . - pp 125 - 152[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-05021 RAB Revue Centre de documentation En réserve L003 Disponible 079-05022 RAB Revue Centre de documentation En réserve L003 Disponible Monitoring surface soil moisture in post-harvest rice areas using C-band radar imagery in NorthEast Thailand / S. Kaojarern in Geocarto international, vol 19 n° 3 (September - November 2004)
[article]
Titre : Monitoring surface soil moisture in post-harvest rice areas using C-band radar imagery in NorthEast Thailand Type de document : Article/Communication Auteurs : S. Kaojarern, Auteur ; Thuy Le Toan, Auteur ; M.W. Davidson, Auteur Année de publication : 2004 Article en page(s) : pp 61 - 71 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] agriculture
[Termes IGN] bande C
[Termes IGN] humidité du sol
[Termes IGN] image ERS-SAR
[Termes IGN] image radar
[Termes IGN] image Radarsat
[Termes IGN] rizière
[Termes IGN] seuillage d'image
[Termes IGN] surveillance agricole
[Termes IGN] surveillance météorologique
[Termes IGN] ThaïlandeRésumé : (Auteur) The objective of this study is to estimate the residual surface soil moisture of rice fields after harvesting, in Northeast Thailand, using Cband SAR images. Such information is use 1 to determine possibilities of cultivating additional shortcycle crops after the harvesting of the main rice crop. To accomplish this objective this study exploits three Cband SAR images acquired over the test area along with simultaneous ground measurements collected in support of analysis of the SAR images. The main parameters measured on the ground were: the volumetric moisture content of the soil using time domain reflectrometry (TDR), the surface roughness, using profile data, and residue cover. Other field environmental factors that might affect radar backscattering, including the topography of rice terraces (elevation, slope, and aspect), bund height between rice fields, soil types, and density of sparse tree stands were also acquired and registered to the image data. Before the analysis, the SAR images were calibrated, registered, and then filtered using multitemporal and spatial filters to reduce variability of the radar backscattering coefficient due to speckle. The measured soil moisture values were then correlated with the radar backscattering coefficients of the experimental plots and the results interpreted in terms of the main environmental factors. Varying residue cover and field aspect angles were found to significantly affect the relationship between radar backscatter and soil moisture content and therefore had to be taken into account before inverting the image data into soil moisture maps. Overall it was found that two soil moisture classes could reliably be separated using the SAR images, and that soil moisture maps could be obtained through a simple inversion technique based on applying a threshold to the SAR images. Analyses of these resulting moisture maps indicate that SAR data is useful to monitor and map surface soil moisture in rice fields after harvest. Numéro de notice : A2004-479 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040408542319 Date de publication en ligne : 02/01/2008 En ligne : https://doi.org/10.1080/10106040408542319 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26997
in Geocarto international > vol 19 n° 3 (September - November 2004) . - pp 61 - 71[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 059-04031 RAB Revue Centre de documentation En réserve L003 Disponible Mapping rice field anopheline breeding habitats in Mali, West Africa, using Landsat ETM+ sensor data / M.A. Diuk-Wasser in International Journal of Remote Sensing IJRS, vol 25 n° 2 (January 2004)
[article]
Titre : Mapping rice field anopheline breeding habitats in Mali, West Africa, using Landsat ETM+ sensor data Type de document : Article/Communication Auteurs : M.A. Diuk-Wasser, Auteur ; M. Bagayoko, Auteur ; N. Sogoba, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 359 - 376 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique
[Termes IGN] carte agricole
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] image Landsat-ETM+
[Termes IGN] maladie tropicale
[Termes IGN] Mali
[Termes IGN] rizièreRésumé : (Auteur) The aim of this study was to determine whether remotely sensed data could be used to identify rice-related malaria vector breeding habitats in an irrigated rice growing area near Niono, Mali. Early stages of rice growth show peak larval production, but Landsat sensor data are often obstructed by clouds during the early part of the cropping cycle (rainy season). In this study, we examined whether a classification based on two Landsat Enhanced Thematic Mapper (ETM)+ scenes acquired in the middle of the season and at harvesting times could be used to map different land uses and rice planted at different times (cohorts), and to infer which rice growth stages were present earlier in the season. We performed a maximum likelihood supervised classification and evaluated the robustness of the classifications with the transformed divergence separability index, the kappa coefficient and confusion matrices. Rice was distinguished from other land uses with 98% accuracy and rice cohorts were discriminated with 84% accuracy (three classes) or 94% (two classes). Our study showed that optical remote sensing can reliably identify potential malaria mosquito breeding habitats from space. In the future, these 'crop landscape maps' could be used to investigate the relationship between cultivation practices and malaria transmission. Numéro de notice : A2004-055 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001598944 En ligne : https://doi.org/10.1080/01431160310001598944 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26583
in International Journal of Remote Sensing IJRS > vol 25 n° 2 (January 2004) . - pp 359 - 376[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-04021 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Cartographie des rizières d'une zone des hautes terres centrales de Madagascar pour la détermination des zones à risque du paludisme / F. Thomas (2004)PermalinkImprovements in land use mapping for irrigated agriculture from satellite sensor data using a multi-stage maximum likelihood classification / I.A. El-Magd in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)PermalinkUsing auxiliary information to adjust fuzzy membership functions for improved mapping of soil qualities / T. Oberthur in International journal of geographical information science IJGIS, vol 14 n° 5 (july 2000)PermalinkRiz des villes, mil des champs en pays Serer - Sénégal / J. Lombard (1993)PermalinkAgriculture, agrometeorological aspects of crops in Iitaly, Spain and Greece / G. Narciso (1992)PermalinkWater turbidity and perpendicular vegetation indices for paddy rice flood damage analyses / Y. Yamagata in Remote sensing of environment, vol 26 n° 3 (01/12/1988)PermalinkFlood damage analysis using multitemporal Landsat Thematic Mapper data / Y. Yamagata in International Journal of Remote Sensing IJRS, vol 9 n° 3 (May 1988)PermalinkMonitoring rice areas using Landsat MSS data / K.R. Mccloy in International Journal of Remote Sensing IJRS, vol 8 n° 5 (May 1987)PermalinkAmélioration des classifications spectrales des périmètres rizicoles de Ségou (Mali) par analyse de la texture des images de simulation SPOT / M.A. Durand (1984)PermalinkClassification multidimensionnelle (spectrale et texturale) des images de satellites / Pong-In Rakariyatham (1984)Permalink